The decrease in antioxidant potential in human brain tumours.

Unlabelled: The objective of our research was to estimate the activity of superoxide dismutase (SOD-1), glutathione peroxidase (GSH-Px) and glutathione reductase (GSSG-R), as well as the concentrations of free oxygen radicals "sweepers" (GSH, Vit.C) and the concentrations of the substances reacting with thiobarbituric acid in brain tumours with II, III and IV level of biological malignancy. The research was conducted on 61 samples obtained from the patients operated in the Department of Neurosurgery of the Medical Academy of Białystok between the years 1996 and 2000.

[Decreased antioxidant-defence mechanisms in cerebrospinal fluid (CSF) in patients with tick-borne encephalitis (TBE)].

14 patients with Tick-borne Encephalitis (TBE) aged 21-64 (mean = 42.3) were analysed. The activity of superoxide dismutase (SOD), glutathione reductase (GSSG-R), glutathione peroxidase (GSH-Px), concentrations of malondialdehyde (MDA) and total sulphydryl groups (-SH) were measured in cerebrospinal fluid (CSF).